Adaptive piezoelectric sensoriactuator
US5578761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Aug 25, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/802
Abstract
An adaptive algorithm implemented in digital or analog form is used in conjunction with a voltage controlled amplifier to compensate for the feedthrough capacitance of piezoelectric sensoriactuator. The mechanical response of the piezoelectric sensoriactuator is resolved from the electrical response by adaptively altering the gain imposed on the electrical circuit used for compensation. For wideband, stochastic input disturbances, the feedthrough capacitance of the sensoriactuator can be identified on-line, providing a means of implementing direct-rate-feedback control in analog hardware. The device is capable of on-line system health monitoring since a quasi-stable dynamic capacitance is indicative of sustained health of the piezoelectric element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.